Which of the following best describes a nation-state?

A. a government that has been recognized by other countries or admitted to membership in the UN
B. a country that has well-defined borders and a government that is based on a shared common identity of all the people
C. any group in the world where the people in the government have a shared identity as a nation
D. a place where there are clear physical boundaries and a well-structured government run by the people

B. a country that has well-defined borders and a government that is based on a shared common identity of all the people

A nation-state is typically characterized by a relatively homogeneous group of people living within defined territorial borders under a sovereign government, with a strong sense of national identity that distinguishes them from other national groups.